import { addWindowMessageListener } from 'src/background/messagePassing/messageUtils'
import { WindowEthereumProxy } from 'src/contentScript/WindowEthereumProxy'
import { isValidContentScriptToProxyEmission } from 'src/contentScript/types'
import { logger } from 'utilities/src/logger/logger'
import { v4 as uuid } from 'uuid'

// TODO(xtine): Get this working by importing the svg file directly. The svg text comes from packages/ui/src/assets/icons/uniswap-logo.svg
const UNISWAP_LOGO = `data:image/svg+xml,${encodeURIComponent(`<svg width="96" height="96" viewBox="0 0 96 96" fill="none" xmlns="http://www.w3.org/2000/svg">
<rect width="96" height="96" rx="18" fill="#FEF4FF"/>
<g filter="url(#filter0_d_12393_20043)">
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</svg>`)}`
const UNISWAP_NAME = 'Uniswap Extension'
const UNISWAP_RDNS = 'org.uniswap.app'

declare global {
  interface Window {
    isStretchInstalled?: boolean
    ethereum?: WindowEthereumProxy
  }
}

enum EIP6963EventNames {
  Announce = 'eip6963:announceProvider',
  Request = 'eip6963:requestProvider',
}

interface EIP6963ProviderInfo {
  uuid: string
  name: string
  icon: string
  rdns: string
}

const uniswapProvider = new WindowEthereumProxy()
window.ethereum = uniswapProvider

addWindowMessageListener(isValidContentScriptToProxyEmission, (message) => {
  logger.debug('ethereum.ts', `Emitting ${message.emitKey} via WindowEthereumProxy`, message.emitValue)
  uniswapProvider.emit(message.emitKey, message.emitValue)
})
function announceProvider(): void {
  const info: EIP6963ProviderInfo = {
    uuid: uuid(),
    name: UNISWAP_NAME,
    icon: UNISWAP_LOGO,
    rdns: UNISWAP_RDNS,
  }

  window.dispatchEvent(
    new CustomEvent(EIP6963EventNames.Announce, {
      detail: Object.freeze({ info, provider: uniswapProvider }),
    }),
  )
}

window.addEventListener(EIP6963EventNames.Request, (event) => {
  if (!isValidRequestProviderEvent(event)) {
    throw new Error(
      `Invalid EIP-6963 RequestProviderEvent object received from ${EIP6963EventNames.Request} event. See https://eips.ethereum.org/EIPS/eip-6963 for requirements.`,
    )
  }

  announceProvider()
})

announceProvider()

type EIP6963RequestProviderEvent = Event & {
  type: EIP6963EventNames.Request
}

function isValidRequestProviderEvent(event: unknown): event is EIP6963RequestProviderEvent {
  return event instanceof Event && event.type === EIP6963EventNames.Request
}
